湖泊科学2011，Vol.23Issue(3)：311-320,10.
青藏高原内陆湖泊变化的遥感制图
Remotely sensed mapping of inland lake area changes in the Tibetan Plateau
摘要
Abstract
Numerous inland lakes of the Tibetan Plateau play sensitive indicators to climate change, and mapping and monitoring these lakes would facilitate our understanding of regional climate and environmental changes. The paper is mainly focused on issues of lake mapping and detecting techniques based on multi-temporal remote sensing imagery, and the differences of lake seasonal and decadal changes were also analyzed. With a series of Landsat MSS/TM/ETM + imagery in recent 30 years, Tibetan lakes in 1970s,1990s, 2000s and 2009 are mapped and their changes are detected temporally and spatially. The lake mapping results showed that Landsat datasets have a good performance on lake area mapping whose lake areas are larger than 0. lkm2. There are minor seasonal variations of lake areas from September to December, so that the season could be taken as the best time periods for lake area mapping. The maximum rate of lake area change is less than 2％. Temporally, lakes presented a shrinking trend during 1970s-1990s, while an expanding trend during 1990s -2009, and the total lake area change rate during 1970s -2009 is 27.3％. Spatially, lakes changing rates varied with their spatial locations: lakes in Qiangtang Plateau show dramatic shrinking changes during 1970s - 1990s while expanding changes during 1990s - 2009; lakes in Selin Co Basin and its surrounding areas show expanding changes in the past 30 years, while lakes in northern valley of the Kangdese and southern Kunlun Mountains remain relatively stable.关键词
青藏高原/湖泊变化/湖泊制图/时空变化分析/遥感Key words
Tibetan Plateau/ lake area changes/ lake mapping/ temporal and spatial changes/ remote sensing引用本文复制引用
李均力,盛永伟,骆剑承,沈占峰..青藏高原内陆湖泊变化的遥感制图[J].湖泊科学,2011,23(3):311-320,10.基金项目
中国科学院西部博士资助项目(XBBS200809)和美国宇航局项目(NNX06AE58G)联合资助. （XBBS200809）
